<!-- 裁剪图片 -->
<template>
  <div class="wrapper">
    <div class="model" v-show="model" @click="model = false">
      <div class="model-show">
        <img :src="modelSrc" alt="">
      </div>
    </div>
    <div class="content">
      <div class="show-info">
        <h2>自动生成截图框 固定比例 w : h => 4 : 3</h2>
        <div class="test">
          <vueCropper ref="cropper2" :img="example2.img " :outputSize="example2.size" :outputType="example2.outputType" :info="example2.info" :canScale="example2.canScale" :autoCrop="example2.autoCrop" :autoCropWidth="example2.autoCropWidth" :autoCropHeight="example2.autoCropHeight" :fixed="example2.fixed" :fixedNumber="example2.fixedNumber" :enlarge="4"></vueCropper>
        </div>
        <label class="btn" for="upload2">上传</label>
        <input type="file" id="upload2" style="position:absolute; clip:rect(0 0 0 0);" accept="image/png, image/jpeg, image/gif, image/jpg" @change="uploadImg($event,2)">
        <button @click="finish2()" class="btn">裁剪</button>
      </div>
    </div>
  </div>
</template>
 
<script>
import { VueCropper } from "vue-cropper";
//记得导入code文件
import codes from "@/components/Upload/code";
// import * as OSS from 'ali-oss';
export default {
  components: {
    VueCropper,
    codes
  },
  data() {
    return {
      model: false,
      modelSrc: "",
      crap: false,
      previews: {},
      form: {
        head: ""
      },
      example2: {
        //img的路径自行修改
        img: "$oss.url + '/' + form.head ",
        info: true,
        size: 1,
        outputType: "jpeg",
        canScale: true,
        autoCrop: true,
        // 只有自动截图开启 宽度高度才生效
        autoCropWidth: 300,
        autoCropHeight: 250,
        fixed: true,
        // 真实的输出宽高
        infoTrue: true,
        fixedNumber: [4, 3]
      },
      downImg: "#"
    };
  },
  methods: {
    //点击裁剪，这一步是可以拿到处理后的地址
    finish2() {
      this.$refs.cropper2.getCropData(data => {
        this.modelSrc = data;
        this.model = false;
        //裁剪后的图片显示
        this.example2.img = this.modelSrc;
        // this.toBlob(data)
        // console.log(data)
        // console.log(this.toBlob(data))

        //阿里云处理图片，项目的接口，这里可以不用，上面的地址打印即为base64的地址
        this.$api.admin.url(data => {
          new OSS.Wrapper({
            region: "oss-cn-hangzhou",
            accessKeyId: data.accessKeyId,
            accessKeySecret: data.accessKeySecret,
            stsToken: data.securityToken,
            // bucket: 'mybg'c
            bucket: "zhiyuan-hz"
          })
            .put(data.key, this.toBlob(this.example2.img))
            .then(data => {
              console.log(data.url);
            })
            .catch(function(err) {
              console.error("error: %j", err);
            });
        });
      });
    },

    uploadImg(e, num) {
      //上传图片
      this.example2.img = "";
      var file = e.target.files[0];
      if (!/\.(gif|jpg|jpeg|png|bmp|GIF|JPG|PNG)$/.test(e.target.value)) {
        alert("图片类型必须是.gif,jpeg,jpg,png,bmp中的一种");
        return false;
      }
      // var reader = new FileReader();
      // reader.onload = e => {
      //   let data;
      //   data = e.target.result;
      //   if (typeof e.target.result === "object") {
      //     // 把Array Buffer转化为blob 如果是base64不需要
      //     data = window.URL.createObjectURL(new Blob([e.target.result]));
      //   } else {
      //     data = e.target.result;
      //   }
      //   if (num === 1) {
      //     this.option.img = data;
      //   } else if (num === 2) {
      //     this.example2.img = data;
      //   }
      // };
      // 转化为base64
      // reader.readAsDataURL(file)
      // 转化为blobcs
      // reader.readAsArrayBuffer(file);
    },
    // base64转blob
    toBlob(ndata) {
      //ndata为base64格式地址
      console.log(ndata);
      let arr = ndata.split(","),
        mime = arr[0].match(/:(.*?);/)[1],
        bstr = atob(arr[1]),
        n = bstr.length,
        u8arr = new Uint8Array(n);
      while (n--) {
        u8arr[n] = bstr.charCodeAt(n);
      }
      return new Blob([u8arr], {
        type: mime
      });
    }
  }
};
</script>
 
<style>
* {
  margin: 0;
  padding: 0;
}

.content {
  margin: auto;
  max-width: 585px;
  margin-bottom: 100px;
}

.test-button {
  display: flex;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  background: #fff;
  border: 1px solid #c0ccda;
  color: #1f2d3d;
  text-align: center;
  box-sizing: border-box;
  outline: none;
  margin: 20px 10px 0px 0px;
  padding: 9px 15px;
  font-size: 14px;
  border-radius: 4px;
  color: #fff;
  background-color: #50bfff;
  border-color: #50bfff;
  transition: all 0.2s ease;
  text-decoration: none;
  user-select: none;
}

.des {
  line-height: 30px;
}

code.language-html {
  padding: 10px 20px;
  margin: 10px 0px;
  display: block;
  background-color: #333;
  color: #fff;
  overflow-x: auto;
  font-family: Consolas, Monaco, Droid, Sans, Mono, Source, Code, Pro, Menlo,
    Lucida, Sans, Type, Writer, Ubuntu, Mono;
  border-radius: 5px;
  white-space: pre;
}

.show-info {
  margin-bottom: 50px;
}

.show-info h2 {
  line-height: 50px;
}

/*.title, .title:hover, .title-focus, .title:visited {
        color: black;
    }*/

.title {
  display: block;
  text-decoration: none;
  text-align: center;
  line-height: 1.5;
  margin: 20px 0px;
  background-image: -webkit-linear-gradient(
    left,
    #3498db,
    #f47920 10%,
    #d71345 20%,
    #f7acbc 30%,
    #ffd400 40%,
    #3498db 50%,
    #f47920 60%,
    #d71345 70%,
    #f7acbc 80%,
    #ffd400 90%,
    #3498db
  );
  color: transparent;
  -webkit-background-clip: text;
  background-size: 200% 100%;
  animation: slide 5s infinite linear;
  font-size: 40px;
}

.test {
  height: 285px;
}

.model {
  position: fixed;
  z-index: 10;
  width: 100vw;
  height: 100vh;
  overflow: auto;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.8);
}

.model-show {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
}

.model img {
  display: block;
  margin: auto;
  max-width: 80%;
  user-select: none;
  background-position: 0px 0px, 10px 10px;
  background-size: 20px 20px;
  background-image: linear-gradient(
      45deg,
      #eee 25%,
      transparent 25%,
      transparent 75%,
      #eee 75%,
      #eee 100%
    ),
    linear-gradient(45deg, #eee 25%, white 25%, white 75%, #eee 75%, #eee 100%);
}

.c-item {
  display: block;
  padding: 10px 0;
  user-select: none;
}

@keyframes slide {
  0% {
    background-position: 0 0;
  }

  100% {
    background-position: -100% 0;
  }
}

@media screen and (max-width: 1000px) {
  .content {
    max-width: 90%;
    margin: auto;
  }

  .test {
    height: 400px;
  }
}
</style>
